Rock drill



July 26, 1927.

A. H. KATTERJOHN nccx DRILL 2 Sheets-Sheet I 1 Filed Feb. 2. 1922 A. KATTERJOHN ROCK DRILL Filed Feb. 2. 1922 2 Sheetg-Sheet 2 Patented July 26, 1927.

UNITED STATES PATENT OFFICE.

AUGUST H. KA'ITERJOHN, OF DENVER, COLORADO, ASSIGI l'OR TO THE DENVER ROCK DRILL MANUFACTURING COMPANY, OF DENVER, COLORADO, A CORPORATION OF DELAWARE.

ROCK DRILL.

Application filed February 2, 1922. Serial No. 533,555.

independent of the motor, and another object is to provide a motor structure that is novel, simple and effective.

Cal

The preferred embodiment of the invention is illustrated in the accompanying drawings, wherein Figure 1 is a longitudinal sectional view through a portion of a drill showing the improved mechanism, I

Figure 2 is a cross sectional view on the line 2-2 of Figure 1,

Figure 3 is a detail sectional View on the line 33 of Figure 2,

Figure 4 is a horizontal sectional view through the motor,

Figure 5 is a longitudinal sectional view including the chuck mechanism.

In the form of structure disclosed, the drilling motor may be of any desired form, and includes a barrel 6 in which a hammer piston 7 reciprocates, said piston having a hammer extension 8 that extends through a head 9. A chuck housing 10 is mounted on the front end of the head 9 and contains a rotatable chuck sleeve 11. This sleeve is provided with an angular socket 12 to receive the rear end of a drill steel 13, and the rear end of the sleeve is counterbored to form a chamber 14 into which the rear end of the drill steel projects and in which the front end of the hammer extension 8 operates to strike said drill steel.

Formed on the housing 10 is the cylinder member 15 of the chuck rotating motor, which is in the form of a turbine. This cylinder member is provided with a chamber .cylinder member. A sleeve 24 surrounds the bolt 22 and roller bearings 25 are interposed between said sleeve and the gear piston 17. A tubular shaft 26is slidably interlocked with the gear piston 18, and is provided with a worm 27. This shaft also has roller bearings 28 and a step bearing 29 at the end opposite the piston. The slidable connection between the gear piston 18 and the shaft 26 prevents the said shaft drawing the piston laterally against the casing and producing undue friction.

Surrounding the chuck sleeve 11 are clutch collars 30 and 31. The clutch collar 30 is rotatable with respect to the sleeve and has a worm gear 32 in mesh with the worm 27. This collar 30 is furthermore provided on its rear face with ratchet teeth 33. The other collar 31 isslidably keyed to the chuck sleeve 11, as shown at 34, and is provided on its front face with ratchet teeth 35 that are adapted to cooperate with the teeth 33 of the collar 30.. The collar 31 is held in coactive relation with the collar 30 by means of a coiledspring 36 that surrounds the rear end of the chuck sleeve 11 and bears against the rear end of the collar 35. It is also pro vided with a rear bearing in theform of a washer 37 keyed to the chuck sleeve and bearing against the front end of the head 9. The chuck sleeve 11 furthermore carries an abutment flange 38 against which the front end of the collar 31'bears whenin its foremost position. lie-ve the collar 30 of the pressure due to the spring 36.

lVhen the chuck rotating motor is in operation, it will be obvious that the shaft 26 is rotated, thereby rotating the worm 27 and revolving the collar 30. The collar 30 is turned in a direction to cause the teeth 33 and 35 to interlock and the rotation is thus transmitted to the collar 31 and to the chuck sleeve. If, however, it is desired to manually turn the drill steel and chuck sleeve, it is only necessary to app-1y a wrench to the steel and turn it in the same direction as when driven by the motor, whereupon the teeth 35 will ride over the teeth 33, the spring 36 allowing the collar 31 the necessary retrograde movement.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art,

This abutment serves to re- 7 without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a rock drill, the combination with a drilling motor, a rotatable chuck for holding a tool'to be operated on by the drilling motor, and a motor for continuously rotat ing the chuck in one direction, of a driven clutch ring. movably interlocked with the chuck, a driving clutch ring, and means driven by the chuck-rotating motor for positively and continuously rotating the driving clutch ring, said clutch rings having interlocking-means that effect the positive constant rotation of the driven clutch ring by the driving clutch ring and permitting the driven clutch ring and chuck to be rotated forward when the clutch rotating motor and driving clutch ring are idle.

2. In a rock drill, the combination with a drilling motor, a rotatable chuck sleeve for holding a tool to be operated on by the drillingmotor, and a motonfor .continu ously rotating the chuck in one direction, of a driven clutch ,ring surrounding the chuck sleeve and slidably interlocked therewith, a driving clutch ring surrounding and rotatable on the chuck sleeve alongside'the driven clutch ring and means driven by the chuck-rotating motor for positively and continuously rotating the driving clutch ring, said clutch rings having interlocking means that effect the positive constant rotation of the driven clutch ring bythe driving clutch ring and permitting the driven clutch ring and chuck sleeve to be rotated forward when the clutch-rotating motor and driving clutch ring ,are idle.

.3. In a rock drill, the combination with a drilling motor, arotatable chuck sleeve for holding a tool to be operated on by the drilling motor, and a motor for continuous- 1y rotating the chuck in one direction. of a driven clutch ringsurrounding the chuck- F sleeve and slidably interlocked therewith, a driving clutch ring surrounding and rotatable on the chuck sleeve alongside the driven clutch ring, driving connections between the motor and driving clutch ring that locks said ring against-rotation when the motor is idle, and means driven by the chuckrotating motor for positively and continuously rotating the drivingclutch ring, said clutch rings having interlocking means that effectthe positive constant rotation of the drivenclutch ring by the driving clutch ring and permitting the driven clutch ring and chuck sleeve to be rotated forward when the clutch rotating motor and driving clutch ring are idle.

4. In a rock drill, the combination with a drilling motor, a rotatable chuck sleeve for holding a tool to be operated on by the drilling motor, and a motor for continu ouslyo rotating the chuck in one direction, of a driven clutch ring surrounding the chuck sleeve and slidablyinterlocked therewith, a driving clutch ring surrounding and rotatable on the chuck sleeve alongside the driven clutch ring, said driving clutch ring having peripheral worm teeth, a shaft con tinuously rotated by the chuck rotating motor and having a worm engaged with the ing clutch ring, and detachably interlock ing teeth between the clutch rings that ef feet the positive constant drive of thedriven ring by the driving ring and pernnt the driven ring and chuck to be rotated forward with respect to the chuckrotating motor and driving clutch ring when the latter are idle.

In testimony whereof, I affix my signature.

AUGUST KATTERJOHN.

worm teeth to continuously rotate the drivcli 

